Improvement in pulsating stencil-pens



J. H. GUNNING 86 B. WEILAND.

- Pulsating Stencil-Pen.

Patented June 3, I879.

UNITED STATES PATENT OFFICE.

JOSIAH H. GUNNING AND HARRY B. WEILAND, OF TITUSVILLE, PA.

IMPROVEMENT IN PULSATING STE NClL-PENS.

Specification forming part of Letters Patent No. 216,086, dated J rule3, 1879 application filed March To all whom it may concern:

Be it known that we, J OSIAH H. GUNNING and HARRY B. WEILAND, ofTitusville, Crawford county, Pennsylvania, have invented an Improvementin the Manner of Operating a Pulsating Stencil-Pen or similar Machine,of which the following is a specification.

Our invention relates to that class of machines which communicate powerfrom a fixed machine or wheel by means of pulsations of air through aflexible connection, causing a very rapid synchronous motion in apulsating bar, to which may be attached a stencil-pen, dental plugger,or similar contrivance. This we do by causing the pulsations to operateon and set in motion a piston, to which is attached the pulsating bar.

The drawings accompanying this specification represent our invention asapplied to operate a stencil-pen, the same being applicable to manyother mechanical devices where a rapid reciprocating motion is required.

Figure 1 represents the bellows and the machinery necessary to operatethe same, the flexible tube, and the pen attached. Fig. 2 is alongitudinal section of the pen, showing the construction and operationof the cylinder, piston, and thrust'bar.

A is a small bellows or elastic air-chamber, the head or end a beingfixed and the end I) loose, and operated on by the rod B, connected withan eccentric upon the shaft to which the pulley Ois attached. From theendaofthebet lows projects a small tube, (1, to which is attached theflexible tube F, leading to and attached to the pen G.

f is an air-tube leading to the air-chamber g h, another air-tube to thecylinderi l k, a tube leading to and terminating in the pencilpoint 1.

In the cylinder i is the piston m, working loosely, and attached to theneedle-bar n, the needle-bar ending at the bottom in the needlepoint 0.

p p are recoil-springs placed inside the cylinders, above and below thepiston, against which the piston cushions, thus checking the motionwithout jar or noise, and assisting the rebound. The spring 2 isattached to the lower or bottom end of the air-tube 7a,. which can beinserted farther into the cylinder 11 or drawn out, and is confined inplace by the set screw S, thus increasing or diminishing the length ofstroke to the piston m, the longer stroke having more force.

Openings t are made in the bottom of the cylinder z to admit theatmospheric pressure.

We claim as our invention The described arrangement and combination ofthe air-tubes f and 71/, cylinder 41, piston m, adjustablerecoil-springs p p,-and reciproeating bar a, the piston being actuatedby pulsations or air-waves communicated through the flexible tube F, thewhole operating substantially as described, and for the purposes hereinset forth.

JOSIAH H. GUNNING. HARRY B. VVEILAND.

Witnesses J. W. GRAHAM, A. B. HOWLAND.

